Denys studies ELF waves generation by an HF ionospheric heater and their propagation in the Earth’s plasma environment. He is also interested in propagation of VLF waves from natural and artificial sources on the ground into the space and their effects (e.g. lightning-induced electron precipitation). In his research he uses DEMETER satellite, HAARP HF transmitter, ground-based VLF receivers and transmitters and other instruments.
Personal homepage: http://www.stanford.edu/~depi/